Accumulated Other Comprehensive Loss - Changes in AOCL by Component (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (82,164)	$ (115,449)
Other comprehensive income (loss) before reclassifications			5,501	(1,687)
Amounts reclassified from AOCL			(3,583)	6,553
Other comprehensive income (loss), net	(8,982)	5,846	1,918	4,866
Spin-Off of Paragon Offshore			34,478
Ending balance	(45,768)	(110,583)	(45,768)	(110,583)
Gains / (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance
Other comprehensive income (loss) before reclassifications			4,358	(1,029)
Amounts reclassified from AOCL			(4,631)	1,618
Other comprehensive income (loss), net			(273)	589
Spin-Off of Paragon Offshore
Ending balance	(273)	589	(273)	589
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(58,598)	(95,071)
Other comprehensive income (loss) before reclassifications
Amounts reclassified from AOCL			1,048	4,935
Other comprehensive income (loss), net			1,048	4,935
Spin-Off of Paragon Offshore			21,772
Ending balance	(35,778)	(90,136)	(35,778)	(90,136)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(23,566)	(20,378)
Other comprehensive income (loss) before reclassifications			1,143	(658)
Amounts reclassified from AOCL
Other comprehensive income (loss), net			1,143	(658)
Spin-Off of Paragon Offshore			12,706
Ending balance	$ (9,717)	$ (21,036)	$ (9,717)	$ (21,036)